I have 2 REI aftermarket side pockets on my pack and a Dana "Wet Rib" front pocket & water bottle holder.

I use these 3 pockets to keep my "necessaries handy. Front pouch has map, compass, energy bars, electrolyte powder packets, etc.

Side pockets are for 1st aid kit, poop kit, stove kit, fuel canisters and toilet kit.

Top lid of my REI Cruise UL 60 pack houses my GTX parka & mosquito net.

Eric
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"There are no comfortable backpacks. Some are just less uncomfortable than others."